A Mixed-Mode Injection Frequency-Locked Loop for Self-Calibration of Injection Locking Range and Phase Noise in 0.13μm CMOS

📋 论文概要

该论文提出了一种混合模式注入频率锁定环（MI-FLL），用于自校准注入锁定振荡器（ILO）的锁定范围和相位噪声，解决了传统ILO锁定范围窄且需要额外功耗的问题。通过闭环配置，无需增加注入电流即可拓宽锁定范围并降低相位噪声。

💡 主要创新点

• 提出混合模式注入频率锁定环架构，结合模拟和数字控制实现自校准，无需额外功耗。
• 通过自校准技术同时优化注入锁定范围和相位噪声，克服了传统开环注入锁定的局限性。

🏷 关键词

📄 原文摘要

Virginia Tech, Blacksburg, VA Injection-locked oscillators (ILOs) are widely used to realize low-noise carrier sources, particularly at mm-Waves by leveraging harmonic injection, but only within a narrow locking range (ΔfL) [1]. Substantial effort has been made to improve ΔfL by increasing the injection current through multiport injections in open-loop architectures at the expense of a fair amount of extra power dissipation (Pdiss) [2]. The ΔfL-limitation can also be mitigated by calibrating the free-running frequency (fosc) of the ILO using a mixer-based closed-loop configuration, but at the expense of significant hardware complexity in the multi-frequency feedback control and substantially increased Pdiss [3]. In the closed-loop self-calibration technique presented in this paper, the feedback signal is primarily processed in the digital domain after extracting the envelope signal bearing the frequency difference between the injection source (finj) and fosc

👥 作者与机构

Dongseok Shin, Sanjay Raman, Kwang-Jin Koh